Block for a toy



FIG. 1 is a top, front right perspective view of a block for a toy showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a bottom, front right perspective view thereof. 

CLAIM The ornamental design for a block for a toy, as shown and described. 